During the building of the base camp, Porro, as well as Freeman trie to calm down an upset Ferretti, who complains to be stuck here.

Later, as a sandstorm is rising, Porro and his fellow teammates have to fold back inside the pyramid. There, he ask how it could be hard to get back through the 'gate.

After an unusual noise and a big shaking, the team spread out. Trying to defend themselves against an unknown enemy, Porro sees Reilly knocked out and dragged away. Then he himself is knocked in the head by an object and falls.

Notes

Porro seemed to be a believer, or at least a supersticious man. He kissed his medal he weared as a necklace before passing through the Stargate.

Porro's rank is visible when he kisses his medal.

Porro is credited as "Lieutenant" in the ending credits (the same for all O'Neill's team members), yet we can see "Airman First Class" insignas on his fatigues' sleeves.

Porro's body is not seen after his knock-out. The Stargate books mention that Porro's body is deposited inside the water-filled pit, yet if we see closely the images, we can see sleeves on the T-shirt. On previous images, Porro had no T-shirt but an ammunition jacket without sleeve. Thus his status is MIA.